These are the facts to rebut just a few of the fallacies I read on a daily basis about our party. The Truth About Yisrael Beytenu Hamad Amar November 8, 2012. Masood Aziz outlines six fallacies they perpetuate about the US engagement in Afghanistan.
The depth at which the disk is no longer visible is taken as a measure of the transparency of the water. This measure is known as the Secchi depth and is related to water turbidity.Since its invention, the disk has also been used in a modified, smaller 20 cm (8 in) diameter, black and white design to measure freshwater transparency. Secchi disk measurement should always be taken off the shady side of a boat or dock between 9 am and 3 pm The period for best results is between 10 am and 2 pm. The same observer should take Secchi depth measurements in the same manner every time.
This researcher is measuring turbidity in a glacial lake using a Secchi disk. The disk is lowered into the water until it can no longer be seen, and the depth of disappearance is recorded. Photo provided by Monica Bruckner. turbidity tube, or T-tube, can be used as an alternative to lowering a Secchi disk through the water column. The T-tube is a plastic tube with a small-scale Secchi disk pattern at its base. Water samples can be poured into the tube and the clarity of the bottom disk can be used to reveal turbidity.